sales@bettercover.cn
450mm x 450mm(17.8"X17.8") D400

450mm x 450mm(17.8"X17.8") D400-Heavy Duty Square Manhole Cover,FRP Manhole Cover,Composite manhole cover and frame

BETTERCOVER heavy duty square SMC FRP manhole cover and frame as per bs EN 124:1994 class D400. clear open dia. 450x450. factory produced, affordable, with longevity corrosion resistance, excellent anti-pressure.

  • Sample: Samples Available for Quality Evaluation
  • Production time:
    Quantity (set)1-2000>2000
    Day5-28negotiated
  • Customized: Ustomizable Sizes, Patterns & Logos
  • Transport: We support sea, air and land transportation.
Select and buy
Product description

summary

Quick details

  • Product name: SMC FRP Composite 450X450mm(17.8"X17.8") D400 Lockable Waterproof Manhole Cover  And Frame
  • Size: 590X590X60mm(23.3"X23.3"X2.4")
  • Clear open:  450X450mm(17.8"X17.8")
  • Function: Lockable, weather-resistant, corrosion-resistant, aging-resistant, impact-resistant, fatigue-resistant, waterproof/sealing, lightweight, non-slip, and anti-static,Theft-proof (no resale value)
  • Color: Black Color
  • Product Structure: Manhole cover and frame, removable side sealing structure, removable sealing handle aluminum sleeve and 3 M8x40 hexagon socket cylinder head lockable bolts
  • Net Weight: 25Kg
  • Product Material: The manhole cover and frame are made of SMC FRP composite material, the removable side sealing structure adopts corrosion-resistant EPDM, the aluminum sleeve of removable sealing handle adopts aluminum alloy, and the M8x40 hexagon lockable bolt adopts 304 stainless steel
  • Working Temperature: -50℃～+150℃
  • Product Standard: BS EN124:2015
  • Load Ratings: D400(40TON)
    Product details



    Function
    		Waterpioof, Lockable, Anti Slip, Anti Static, Corrosion Resistantand aging resistant
    Product Color
    		Black Color


    unit:mm



    Product structure size

    (mm)

    		Manhole cover  DepthManhole cover  DiaManhole Frame  HeightLoad Ratings
    40498X49860D400
    Manhole Frame Outer DiaClear  Open DiaInspection  CocerWeight(Kg)
    590X590450X450 25


    unit:in

    450x450-D400.png


    Product structure size

    (in)

    		Manhole cover  DepthManhole cover  DiaManhole Frame  HeightLoad Ratings
    1.5719.61×19.612.36D400
    Manhole Frame Outer DiaClear  Open DiaInspection  CocerWeight(Kg)
    23.23×23.2317.72×17.72 25



    If the product is used in an unsealed environment for drainage or sewage ,the handle hole of the manhole cover is a drainage handle aluminum sleeve ,and removable rubber seal is not installed on the manhole Fram

    Application


    • Freight station
    • Wharf
    • Gas stations
    • Other heavy roads and sites frequently used



    • A15
      A155 Tonnes
      Areas which can only be used by pedestrians and pedal cyclists.
    • B125
      B12512.5 Tonnes
      Footways, pedestrian areas and comparable areas, car parks, or car parking decks.
    • C250
      C25025 Tonnes
      For gully gratings installed in the area of kerbside channels of roads. This area extends from a maximum of 0.5m into a carriageway to a maximum of 0.2m into the footway. Recommended for minor roads/areas of slow moving traffic.
    • D400
      D40040 Tonnes
      For covers and gratings used in carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles.

    Constantly strive for perfection

    ●Support Customization Of Products With Customer Logo



    ●Screw locking mechanism



    ●Waterproof and non-slip

    Because the upper surface of the manhole cover is a raised bridge structure, it can effectively prevent the accumulation of rainwater on the surface of the manhole cover. The anti-skid ability of the surface of the manhole cover is greatly improved.


    ●The aluminum sleeve of removable sealing handle adopts aluminum alloy


    ●Watertight seal


    ●Frame


    ●Tool

    We have mature OEM and ODM experience

    Customizable logo, cover pattern, color and size





    Light weight

    The weight of composite manhole cover is 1 / 4 of that of traditional manhole cover with the same volume


    Excellent bridge structure



    Factory Overview


    Applications

    Products comply with EN124-5 2015 and AS3996 2006 standards, and are suitable for applications in -50°-150° ambient temperature, as well as in lawns, indoors, sidewalks, non-motorized lanes,car parking lots 、Gas stations, freight stations, docks and other heavy roads and sites that are frequently used Meet all kinds of products with A15, B125,C250, D400, E600 load-bearing grades.

    4641465343f2715e98909eaf0ee6e51b.png90c5817338386d026d57136c371e7c2d.png

    Packing and shipping

    We can provide standard carton, wooden box, iron pallet and other packaging, or according to your requirements.


    BACK
    Other products
    CONTACT
    Please send the message
    sales@bettercover.cn
    © 2026 Wenzhou Kehui Road Facilities Co., Ltd. All Rights Reserved. Unauthorized reproduction or distribution of any content is prohibited.